CAS No.:60-18-4
L-Tyrosine
Molecular Formula：C9H11NO3
Molecular Weight: 181.19
CAS Number: 60-18-4
Specifications
| L-Tyrosine | CP2020 | EP11 | USP2023 |
| content | ≥99.0% | 99.0-101.0% | 98.5-101.5% |
| acidity | 5.0-6.5 | / | / |
| Specific rotation [a]D20 | -11.3°–12.1° | -11.0°–12.3° | / |
| Specific rotation [a]D25 | / | / | -9.8°–11.2° |
| Light | ≥95.0% | / | / |
| Solution appearance | / | clear & colorless≤Y7 | / |
| chloride | ≤0.02% | ≤0.02% | ≤0.04% |
| Ammonium salt | ≤0.02% | ≤0.02% | / |
| sulfate | ≤0.02% | ≤0.03% | ≤0.04% |
| Iron salts | ≤10PPM | ≤10PPM | ≤30PPM |
| heavy metal | ≤10PPM | / | / |
| Arsenic salts | ≤1PPM | / | / |
| Other amino acids | ≤0.40% | / | individual impurities≤0.5% total impurities≤2.0% |
| Ninhydrin active substance | / | Impurity A≤0.5% Each impurity≤0.2% Sum of impurities≤0.6% | / |
| Loss on drying | ≤0.20% | ≤0.50% | ≤0.30% |
| Residue on ignition | ≤0.10% | ≤0.10% | ≤0.40% |
| endotoxin | <0.25EU/ml | <0.25EU/ml | <0.25EU/ml |
| Total bacteria | ≤ 500 CFU/g | ≤ 500 CFU/g | ≤ 500 CFU/g |
| Mold & yeast | ≤ 50 CFU/g | ≤ 50 CFU/g | ≤ 50 CFU/g |